[GRASS-dev] [GRASS GIS] #1605: WXGUI d.vect doesn't offer all vector map layers in a dropdown list

[GRASS GIS]

#1605: WXGUI d.vect doesn't offer all vector map layers in a dropdown list
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 Reporter:  marisn        |       Owner:  grass-dev@…              
     Type:  defect        |      Status:  new                      
 Priority:  major         |   Milestone:  6.4.3                    
Component:  wxGUI         |     Version:  6.4.2                    
 Keywords:  vector layer  |    Platform:  Unspecified              
      Cpu:  Unspecified   |  
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Comment(by hamish):

 Hi,

 sorry I am coming late to this conversation, and I mostly work with
 rasters so am a bit thin on the category layer know-how, but to summarize,
 the trouble was that you can have multiple layers of categories connected
 to topological data features within the same map, and each of those layers
 may or may not have a DB connection specified in vector/$MAP/dbln, right?

 So using `v.db.connect -g` only listed the layers with DB connections, and
 missed the layers that existed as category-only.
 But the new v.category option will list all that exist w/ or w/o a DB
 connection. (note not used very much, but as in `v.db.connect -g` the
 layer number can have a /name alias too. that might only be widely used in
 DBs like Oracle, or a "for the future" idea from Radim?)


 is that right?


 To help me visualize using layers better, could someone suggest a use case
 for when you'd use this? (the whole thing is a little mysterious to me)


 trying to understand,
 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1605#comment:12>
GRASS GIS <http://grass.osgeo.org>